| // RUN: %clang_cc1 -ffixed-point -S -emit-llvm %s -o - | FileCheck %s -check-prefix=DEFAULT |
| // RUN: %clang_cc1 -ffixed-point -S -emit-llvm %s -o - -fpadding-on-unsigned-fixed-point | FileCheck %s -check-prefix=SAME |
| |
| void TestFixedPointCastSameType() { |
| _Accum a = 2.5k; |
| _Accum a2 = a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a2, align 4 |
| |
| a2 = (_Accum)a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a2, align 4 |
| } |
| |
| void TestFixedPointCastDown() { |
| long _Accum la = 2.5lk; |
| _Accum a = la; |
| // DEFAULT: [[LACCUM:%[0-9a-z]+]] = load i64, i64* %la, align 8 |
| // DEFAULT-NEXT: [[ACCUM_AS_I64:%[0-9a-z]+]] = ashr i64 [[LACCUM]], 16 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i64 [[ACCUM_AS_I64]] to i32 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4 |
| |
| a = (_Accum)la; |
| // DEFAULT: [[LACCUM:%[0-9a-z]+]] = load i64, i64* %la, align 8 |
| // DEFAULT-NEXT: [[ACCUM_AS_I64:%[0-9a-z]+]] = ashr i64 [[LACCUM]], 16 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i64 [[ACCUM_AS_I64]] to i32 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4 |
| |
| short _Accum sa = a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: [[SACCUM_AS_I32:%[0-9a-z]+]] = ashr i32 [[ACCUM]], 8 |
| // DEFAULT-NEXT: [[SACCUM:%[0-9a-z]+]] = trunc i32 [[SACCUM_AS_I32]] to i16 |
| // DEFAULT-NEXT: store i16 [[SACCUM]], i16* %sa, align 2 |
| |
| sa = (short _Accum)a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: [[SACCUM_AS_I32:%[0-9a-z]+]] = ashr i32 [[ACCUM]], 8 |
| // DEFAULT-NEXT: [[SACCUM:%[0-9a-z]+]] = trunc i32 [[SACCUM_AS_I32]] to i16 |
| // DEFAULT-NEXT: store i16 [[SACCUM]], i16* %sa, align 2 |
| } |
| |
| void TestFixedPointCastUp() { |
| short _Accum sa = 2.5hk; |
| _Accum a = sa; |
| // DEFAULT: [[SACCUM:%[0-9a-z]+]] = load i16, i16* %sa, align 2 |
| // DEFAULT-NEXT: [[SACCUM_BUFF:%[0-9a-z]+]] = sext i16 [[SACCUM]] to i32 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[SACCUM_BUFF]], 8 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4 |
| |
| long _Accum la = a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: [[ACCUM_BUFF:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64 |
| // DEFAULT-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_BUFF]], 16 |
| // DEFAULT-NEXT: store i64 [[LACCUM]], i64* %la, align 8 |
| |
| a = (_Accum)sa; |
| // DEFAULT: [[SACCUM:%[0-9a-z]+]] = load i16, i16* %sa, align 2 |
| // DEFAULT-NEXT: [[SACCUM_BUFF:%[0-9a-z]+]] = sext i16 [[SACCUM]] to i32 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[SACCUM_BUFF]], 8 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4 |
| |
| la = (long _Accum)a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: [[ACCUM_BUFF:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64 |
| // DEFAULT-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_BUFF]], 16 |
| // DEFAULT-NEXT: store i64 [[LACCUM]], i64* %la, align 8 |
| } |
| |
| void TestFixedPointCastSignedness() { |
| _Accum a = 2.5k; |
| unsigned _Accum ua = a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: [[UACCUM:%[0-9a-z]+]] = shl i32 [[ACCUM]], 1 |
| // DEFAULT-NEXT: store i32 [[UACCUM]], i32* %ua, align 4 |
| // SAME: TestFixedPointCastSignedness |
| // SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // SAME-NEXT: store i32 [[ACCUM]], i32* %ua, align 4 |
| |
| a = ua; |
| // DEFAULT: [[UACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = lshr i32 [[UACCUM]], 1 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4 |
| // SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4 |
| // SAME-NEXT: store i32 [[ACCUM]], i32* %a, align 4 |
| |
| ua = (unsigned _Accum)a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: [[UACCUM:%[0-9a-z]+]] = shl i32 [[ACCUM]], 1 |
| // DEFAULT-NEXT: store i32 [[UACCUM]], i32* %ua, align 4 |
| |
| a = (_Accum)ua; |
| // DEFAULT: [[UACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = lshr i32 [[UACCUM]], 1 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4 |
| |
| _Accum a2; |
| unsigned long _Accum ula = a2; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a2, align 4 |
| // DEFAULT-NEXT: [[ACCUM_EXT:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64 |
| // DEFAULT-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_EXT]], 17 |
| // DEFAULT-NEXT: store i64 [[LACCUM]], i64* %ula, align 8 |
| // SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a2, align 4 |
| // SAME-NEXT: [[ACCUM_EXT:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64 |
| // SAME-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_EXT]], 16 |
| // SAME-NEXT: store i64 [[LACCUM]], i64* %ula, align 8 |
| } |
| |
| void TestFixedPointCastSaturation() { |
| _Accum a; |
| _Sat short _Accum sat_sa; |
| _Sat _Accum sat_a; |
| _Sat long _Accum sat_la; |
| _Sat unsigned short _Accum sat_usa; |
| _Sat unsigned _Accum sat_ua; |
| _Sat unsigned long _Accum sat_ula; |
| _Sat short _Fract sat_sf; |
| _Sat _Fract sat_f; |
| _Sat long _Fract sat_lf; |
| |
| // Casting down between types |
| sat_sa = sat_a; |
| // DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 8 |
| // DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 32767 |
| // DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]] |
| // DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], -32768 |
| // DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 -32768, i32 [[RESULT]] |
| // DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16 |
| // DEFAULT-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_sa, align 2 |
| |
| // Accum to Fract, decreasing scale |
| sat_sf = sat_a; |
| // DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4 |
| // DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 8 |
| // DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[FRACT]], 127 |
| // DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 127, i32 [[FRACT]] |
| // DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], -128 |
| // DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 -128, i32 [[RESULT]] |
| // DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i8 |
| // DEFAULT-NEXT: store i8 [[RESULT_TRUNC]], i8* %sat_sf, align 1 |
| |
| // Accum to Fract, same scale |
| sat_f = a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 32767 |
| // DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]] |
| // DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], -32768 |
| // DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 -32768, i32 [[RESULT]] |
| // DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16 |
| // DEFAULT-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_f, align 2 |
| |
| // Accum to Fract, increasing scale |
| sat_lf = sat_a; |
| // DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = sext i32 [[OLD_ACCUM]] to i48 |
| // DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = shl i48 [[ACCUM]], 16 |
| // DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i48 [[FRACT]], 2147483647 |
| // DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i48 2147483647, i48 [[FRACT]] |
| // DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i48 [[RESULT]], -2147483648 |
| // DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i48 -2147483648, i48 [[RESULT]] |
| // DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i48 [[RESULT2]] to i32 |
| // DEFAULT-NEXT: store i32 [[RESULT_TRUNC]], i32* %sat_lf, align 4 |
| |
| // Signed to unsigned, decreasing scale |
| _Sat _Accum sat_a2; |
| sat_usa = sat_a2; |
| // DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a2, align 4 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 7 |
| // DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 65535 |
| // DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 65535, i32 [[ACCUM]] |
| // DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], 0 |
| // DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 0, i32 [[RESULT]] |
| // DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16 |
| // DEFAULT-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_usa, align 2 |
| // SAME: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a2, align 4 |
| // SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 8 |
| // SAME-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 32767 |
| // SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]] |
| // SAME-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], 0 |
| // SAME-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 0, i32 [[RESULT]] |
| // SAME-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16 |
| // SAME-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_usa, align 2 |
| |
| // Signed to unsigned, increasing scale |
| sat_ua = sat_a; |
| // DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4 |
| // DEFAULT-NEXT: [[ACCUM_EXT:%[0-9a-z]+]] = sext i32 [[OLD_ACCUM]] to i33 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i33 [[ACCUM_EXT]], 1 |
| // DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i33 [[ACCUM]], 0 |
| // DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i33 0, i33 [[ACCUM]] |
| // DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i33 [[RESULT2]] to i32 |
| // DEFAULT-NEXT: store i32 [[RESULT_TRUNC]], i32* %sat_ua, align 4 |
| // SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4 |
| // SAME-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[ACCUM]], 0 |
| // SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 0, i32 [[ACCUM]] |
| // SAME-NEXT: store i32 [[RESULT]], i32* %sat_ua, align 4 |
| |
| // Nothing when saturating to the same type and size |
| sat_a = a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %sat_a, align 4 |
| |
| // Nothing when assigning back |
| a = sat_a; |
| // DEFAULT: [[SAT_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4 |
| // DEFAULT-NEXT: store i32 [[SAT_ACCUM]], i32* %a, align 4 |
| |
| // No overflow when casting from fract to signed accum |
| sat_a = sat_f; |
| // DEFAULT: [[FRACT:%[0-9a-z]+]] = load i16, i16* %sat_f, align 2 |
| // DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i16 [[FRACT]] to i32 |
| // DEFAULT-NEXT: store i32 [[FRACT_EXT]], i32* %sat_a, align 4 |
| |
| // Only get overflow checking if signed fract to unsigned accum |
| sat_ua = sat_sf; |
| // DEFAULT: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sat_sf, align 1 |
| // DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i17 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i17 [[FRACT_EXT]], 9 |
| // DEFAULT-NEXT: [[IS_NEG:%[0-9a-z]+]] = icmp slt i17 [[ACCUM]], 0 |
| // DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[IS_NEG]], i17 0, i17 [[ACCUM]] |
| // DEFAULT-NEXT: [[RESULT_EXT:%[0-9a-z]+]] = sext i17 [[RESULT]] to i32 |
| // DEFAULT-NEXT: store i32 [[RESULT_EXT]], i32* %sat_ua, align 4 |
| // SAME: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sat_sf, align 1 |
| // SAME-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i16 |
| // SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i16 [[FRACT_EXT]], 8 |
| // SAME-NEXT: [[IS_NEG:%[0-9a-z]+]] = icmp slt i16 [[ACCUM]], 0 |
| // SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[IS_NEG]], i16 0, i16 [[ACCUM]] |
| // SAME-NEXT: [[RESULT_EXT:%[0-9a-z]+]] = sext i16 [[RESULT]] to i32 |
| // SAME-NEXT: store i32 [[RESULT_EXT]], i32* %sat_ua, align 4 |
| } |
| |
| void TestFixedPointCastBetFractAccum() { |
| short _Accum sa; |
| _Accum a; |
| long _Accum la; |
| short _Fract sf; |
| _Fract f; |
| long _Fract lf; |
| unsigned _Accum ua; |
| unsigned _Fract uf; |
| |
| // To lower scale |
| sf = a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = ashr i32 [[ACCUM]], 8 |
| // DEFAULT-NEXT: [[FRACT_TRUNC:%[0-9a-z]+]] = trunc i32 [[FRACT]] to i8 |
| // DEFAULT-NEXT: store i8 [[FRACT_TRUNC]], i8* %sf, align 1 |
| |
| // To higher scale |
| a = sf; |
| // DEFAULT: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sf, align 1 |
| // DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i32 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[FRACT_EXT]], 8 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4 |
| |
| // To same scale |
| f = a; |
| // DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4 |
| // DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = trunc i32 [[ACCUM]] to i16 |
| // DEFAULT-NEXT: store i16 [[FRACT]], i16* %f, align 2 |
| |
| a = f; |
| // DEFAULT: [[FRACT:%[0-9a-z]+]] = load i16, i16* %f, align 2 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = sext i16 [[FRACT]] to i32 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4 |
| |
| // To unsigned |
| ua = uf; |
| // DEFAULT: [[FRACT:%[0-9a-z]+]] = load i16, i16* %uf, align 2 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = zext i16 [[FRACT]] to i32 |
| // DEFAULT-NEXT: store i32 [[ACCUM]], i32* %ua, align 4 |
| // SAME: [[FRACT:%[0-9a-z]+]] = load i16, i16* %uf, align 2 |
| // SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = zext i16 [[FRACT]] to i32 |
| // SAME-NEXT: store i32 [[ACCUM]], i32* %ua, align 4 |
| |
| uf = ua; |
| // DEFAULT: [[FRACT:%[0-9a-z]+]] = load i32, i32* %ua, align 4 |
| // DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i32 [[FRACT]] to i16 |
| // DEFAULT-NEXT: store i16 [[ACCUM]], i16* %uf, align 2 |
| // SAME: [[FRACT:%[0-9a-z]+]] = load i32, i32* %ua, align 4 |
| // SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i32 [[FRACT]] to i16 |
| // SAME-NEXT: store i16 [[ACCUM]], i16* %uf, align 2 |
| } |